Metal clamp



E. J. GREGOVSKY. METAL CLAMP. APPLICATION FILED JULY 10,1919.

1,334, 1 5 1 Patented Mar. 16, 1920.

A AY

WIT/VESSES entran EMMANUEL J". GREGOVSKY, OF PENSACOLA, FLORIDA.

.METAL CLAMP.

Specc'ation of Letters Patent.

Patented Mar. 16, 1920.

Application ieanuy 1o, 1919. -4serial No. 309,855.

T 0 all whom it may concern.'

Be it known that 1, EMMANUEL J. GRE- oovsn, a citizen of the United States, residing at Pensacola, in the county of Escambia and State of Florida,vhave invented certain new andl Vuseful niprovements Clamps, of which the following is a specification. Y

ln ship building and in metal working generally it frequently Vhappens that parts to be secured are required to be drawn together by the expenditure of a relatively great amount of force. Particularly is this the case where metal plates to be riveted are required to be drawn into close contact to insure proper set and application of the rivets.

The present invention provides a device which may be used in a relatively small space and which enables the application of a great amount of force so that boiler plates or protecting` plates for ships may be drawn closely together and held in such position during the application of rivets or like fastenings, wh in the required position.

The drawing illustrates a preferred embodiment of the invention. However, it is to be understood that in adapting the same to meet different conditions, various changes in the form, proportion, and minor details of construction may be resorted to without departing from the nature of the invention as claimed hereinafter.

Referring to the drawing,

Figure 1 represents a clamp em, odying the invention showing the same in central longitudinal section and as Aapplied for drawing two metal plates into close contact; and

Fig. 2 is a. section on the line 22 of Fig. 1. Y

Corresponding and like parts are referred to in the following description and indicated in both views of the drawing.

The numeral 1 designates a power screw which is formed with a reduced portion 2 threaded to receive a nut 3 which constitutes a stop or abutment to engage the work upon one side. The power screw 1 is mounted within a casing 4 which is formed intermediate of its ends with an enlargement 5 to receive a nut 6 having worm cogs 7 around its outer edge to cooperate with a worm 8 on a shaft 9 which is mounted in the enin Metal ereby the plates are made securev larged portion 5 of the casing at a right angle to the power screw 1. One end of the shaft 9 projects and is of non-circular form in cross section to receive a ratchet wrench or lother tool by means of which the shaft 9' and worm 8 may be rotated'to impart rotary movement to the power screw 1, wherey the same is caused to move longitudinally within the casing 4. The casing L1 may be of any construction to admit of the read;v assembling of the parts and one yend is closed by means of a cap 10 to'which is fitted a suitable indicator 11, Vwhereby it may be known when the pressure screw has been moved inward to the limit of its travel without causing injury to the device. The end of the casing through which the stem or reduced portion 2 of the power screw passes constitutes an abutment for one side of the work and the faces of the two abutments between which the work is clamped are made concave, thereby insuring proper application of the pressure so as to draw the parts of the work into close contact about the openingstherein through which the stem 12 passes and which are designed to receive the rivets or other fastening means, not shown.

In Fig. 1, the numeral 12 designates two metal plates which are required to be drawn into close contact, said plates being provide with openings 13 for reception of the rivets or fastenings. In accordance with the invention, the power screw 1 is moved so as to roject the stem or reduced vportion 2. The nut 3 is removed from the stem or part `2 andthe latter is passed through registering openings of the plates 12. The nut 3 is now placed in position upon the stem 2 and is turned so as to clamp the plates between the part 3 and the abutting end of the casing 4. The power screw 1 is now moved longitudinally within the casing by rotation ofthe shaft 9, which may be accomplished by means of a ratchet wrench or other tool, not shown, applied to the projecting end of the shaft. As the shaft 9 is rotated the worm 8 meshing with the worm cogs 7 of the nut 6 rotates the latterl and effects a longitudinal movement of the power screw, with the result that the plates 12 are lultimately drawn into close contact and are held in such position until a rivet or fastening is introduced through registering openings 13 and made 'secure in a manner well understood. The

clamp isnow removed by reversing the'ro-kexpedient and fall within tlie scope of the tation of the shaft 9 and after the pressure appended claim. on the nut 3 has been removed to admit of `Having thus fully described my invensaid nut being unscrewed, it 1sV removedV tion, what I claim Aas new and desire to Sefrom the stem 2 and the clamp withdrawnl cure by Letters Patent 'is:-

and readjusted to the new position where A device of the character specified, comrequired for service to draw the work to- 'prising a casing, a power screw mounted gether. Y Within thecasing and having a projecting It willlbe understood from the foregoing end ior engaging the work, an abutment-on taken in connection with theaccompanying v the projecting 'end'to confine the work bedrawing that the invention provides for a tween it and the end of the casinga nut simple device which may be effectively opwithin the casing and mounted upon the erated in a relatively small spacefor Vdrawpower screw, means for rotating the nut to ing two plates or other partev into close coneect a longitudinal movement of the power tact and holding the same until made secure, Y v screw,v and an indicator on the casing said device admitting ofthe effective appliadapted Vto be engaged by the inner end of cation or" a relatively great amount of force Vtllepower screw to designate the vinnermost for drawingtlie parts into close contact. position 0f the latter. Y

The foregoing description and the draw-V In testimony whereof I affix my Signature infr have reference to what may be considin presence of two witnesses.

ered the preferred or approved Vform of my invention. It is ,to be .understoodthat I EMMANUEL GREGOVSKY' Vmay make such changes 1n construction and Witnesses:

arrangement and combination of parts, ma- HELEN GREGOVSKY, teria-ls, dimensions, et cetera, as may prove A. M. GREGovsK-Y. 

